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https://github.com/mozilla/cipherscan.git
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Merge pull request #54 from jvehent/jvehent-rework-tomato42-curves-tolerance-5
Jvehent rework tomato42 curves tolerance 5, closes #46
This commit is contained in:
Julien Vehent
commit
1a26e09c7b
370
cipherscan
370
cipherscan
@ -68,6 +68,10 @@ TIMEOUT=30
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# trust anchors are stored
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CAPATH=""
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SAVECRT=""
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TEST_CURVES="False"
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has_curves="False"
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# openssl formated list of curves that will cause server to select ECC suite
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ecc_ciphers=""
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unset known_certs
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declare -A known_certs
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unset cert_checksums
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@ -106,6 +110,7 @@ Use one of the options below:
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-j | --json Output results in JSON format.
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-o | --openssl path/to/your/openssl binary you want to use.
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--savecrt path where to save untrusted and leaf certificates
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--[no-]curves test ECC curves supported by server (req. OpenSSL 1.0.2)
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-v | --verbose Increase verbosity.
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The rest of the arguments will be interpreted as openssl s_client argument.
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@ -128,6 +133,68 @@ debug(){
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fi
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}
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# obtain an array of curves supported by openssl
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CURVES=(sect163k1 # K-163
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sect163r1
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sect163r2 # B-163
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sect193r1
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sect193r2
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sect233k1 # K-233
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sect233r1 # B-233
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sect239k1
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sect283k1 # K-283
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sect283r1 # B-283
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sect409k1 # K-409
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sect409r1 # B-409
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sect571k1 # K-571
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sect571r1 # B-571
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secp160k1
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secp160r1
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secp160r2
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secp192k1
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prime192v1 # P-192 secp192r1
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secp224k1
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secp224r1 # P-224
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secp256k1
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prime256v1 # P-256 secp256r1
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secp384r1 # P-384
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secp521r1 # P-521
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brainpoolP256r1
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brainpoolP384r1
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brainpoolP512r1)
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# many curves have alternative names, this array provides a mapping to find the IANA
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# name of a curve using its alias
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CURVES_MAP=("sect163k1 K-163"
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"sect163r2 B-163"
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"sect233k1 K-233"
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"sect233r1 B-233"
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"sect283k1 K-283"
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"sect283r1 B-283"
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"sect409k1 K-409"
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"sect409r1 B-409"
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"sect571k1 K-571"
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"sect571r1 B-571"
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"prime192v1 P-192 secp192r1"
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"secp224r1 P-224"
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"prime256v1 P-256 secp256r1"
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"secp384r1 P-384"
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"secp521r1 P-521")
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get_curve_name() {
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local identifier=$1
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for c in "${CURVES_MAP[@]}"; do
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if [[ "$c" =~ $identifier ]]; then
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verbose "$c matches identifier $identifier"
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local map=(${c// / })
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echo ${map[0]}
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return
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fi
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done
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echo $identifier
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return
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}
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c_hash() {
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local h=$(${OPENSSLBIN} x509 -hash -noout -in "$1/$2" 2>/dev/null)
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for ((num=0; num<=100; num++)) ; do
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@ -371,6 +438,7 @@ test_cipher_on_target() {
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fi
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cipher=$current_cipher
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pfs=$current_pfs
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[ -z $pfs ] && pfs="None"
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pubkey=$current_pubkey
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sigalg=$current_sigalg
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trusted=$current_trusted
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@ -388,13 +456,28 @@ test_cipher_on_target() {
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# if cipher contains NONE, the cipher wasn't accepted
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elif [ "$cipher" == '(NONE) ' ]; then
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result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs"
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result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs $current_curves $curves_ordering"
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verbose "handshake failed, server returned ciphersuite '$result'"
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return 1
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# the connection succeeded
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else
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result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs"
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current_curves="None"
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# if pfs uses ECDH, test supported curves
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if [[ $pfs =~ ECDH ]]; then
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has_curves="True"
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if [ $TEST_CURVES == "True" ]; then
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test_curves
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if [ "$ecc_ciphers" != "" ]; then
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ecc_ciphers+=":"
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fi
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ecc_ciphers+="$cipher"
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else
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# resolve the openssl curve to the proper IANA name
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current_curves="$(get_curve_name $(echo $pfs|cut -d ',' -f2))"
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fi
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fi
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result="$cipher $protocols $pubkey $sigalg $trusted $tickethint $ocspstaple $pfs $current_curves $curves_ordering"
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verbose "handshake succeeded, server returned ciphersuite '$result'"
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return 0
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fi
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@ -455,6 +538,7 @@ display_results_in_terminal() {
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local trusted
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local tickethint
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local ocspstaple
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local curvesordering
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local different=False
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echo "Target: $TARGET"; echo
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for cipher in "${cipherspref[@]}"; do
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@ -473,6 +557,9 @@ display_results_in_terminal() {
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trusted="${cipher_data[4]}"
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tickethint="${cipher_data[5]}"
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ocspstaple="${cipher_data[6]}"
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if [[ $TEST_CURVES == "True" && "${cipher_data[9]}" != "" ]]; then
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curvesordering="${cipher_data[9]}"
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fi
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else
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if [ "$pubkey" != "${cipher_data[2]}" ]; then
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different=True
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@ -486,23 +573,33 @@ display_results_in_terminal() {
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if [ "$tickethint" != "${cipher_data[5]}" ]; then
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different=True
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fi
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if [ "$ocspstaple" != "${cipher_data[6]}" ]; then
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different=True
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fi
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if [[ "$curvesordering" == "" && "${cipher_data[9]}" != "" ]]; then
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curvesordering="${cipher_data[9]}"
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fi
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if [[ "$curvesordering" != "" && "$curvesordering" != "${cipher_data[9]}" ]]; then
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different=True
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fi
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fi
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results=("${results[@]}" "$r")
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ctr=$((ctr+1))
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done
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header="prio ciphersuite protocols"
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if [ $different == "True" ]; then
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header+=" pubkey_size signature_algoritm trusted ticket_hint ocsp_staple"
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fi
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header+=" pfs"
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if [ $has_curves == "True" ]; then
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header+=" curves"
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if [[ $TEST_CURVES == "True" && $different == "True" ]]; then
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header+=" curves_ordering"
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fi
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fi
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if [ $DOBENCHMARK -eq 1 ]; then
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if [ $different == "True" ]; then
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header="prio ciphersuite protocols pubkey_size signature_algoritm trusted ticket_hint ocsp_staple pfs_keysize avg_handshake_microsec"
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else
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header="prio ciphersuite protocols pfs_keysize avg_handshake_microsec"
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fi
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else
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if [ $different == "True" ]; then
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header="prio ciphersuite protocols pubkey_size signature_algorithm trusted ticket_hint ocsp_staple pfs_keysize"
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else
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header="prio ciphersuite protocols pfs_keysize"
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fi
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header+=" avg_handshake_microsec"
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fi
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ctr=0
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for result in "${results[@]}"; do
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@ -513,8 +610,8 @@ display_results_in_terminal() {
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if [ $different == "True" ]; then
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echo $result|grep -v '(NONE)'
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else
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# prints priority, ciphersuite, protocols and pfs_keysize
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awk '!/(NONE)/{print $1 " " $2 " " $3 " " $9}' <<<"$result"
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# prints priority, ciphersuite, protocols and pfs
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awk '!/(NONE)/{print $1 " " $2 " " $3 " " $9 " " $10}' <<<"$result"
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fi
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done|column -t
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echo
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@ -532,9 +629,13 @@ display_results_in_terminal() {
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echo "OCSP stapling: not supported"
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fi
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if [[ $serverside == "True" ]]; then
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echo "Server side cipher ordering"
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echo "Cipher ordering: server"
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else
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echo "Client side cipher ordering"
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echo "Cipher ordering: client"
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fi
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if [ $TEST_CURVES == "True" ]; then
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echo "Curves ordering: $curvesordering"
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echo "Curves fallback: $fallback_supported"
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fi
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}
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@ -557,10 +658,23 @@ display_results_in_json() {
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echo -n "\"ocsp_stapling\":\"${cipher_arr[6]}\","
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pfs="${cipher_arr[7]}"
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[ "$pfs" == "" ] && pfs="None"
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echo -n "\"pfs\":\"$pfs\"}"
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echo -n "\"pfs\":\"$pfs\""
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if [[ "${cipher_arr[0]}" =~ ECDH ]]; then
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echo -n ","
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echo -n "\"curves\":[\"${cipher_arr[8]//,/\",\"}\"]"
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if [ $TEST_CURVES == "True" ]; then
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echo -n ","
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echo -n "\"curves_ordering\":\"${cipher_arr[9]}\""
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fi
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fi
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echo -n "}"
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ctr=$((ctr+1))
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done
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echo ']}'
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echo -n ']'
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if [ $TEST_CURVES == "True" ]; then
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echo -n ",\"curves_fallback\":\"$fallback_supported\""
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fi
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echo '}'
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}
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test_serverside_ordering() {
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@ -616,6 +730,205 @@ test_serverside_ordering() {
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fi
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}
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test_curves() {
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# "True" if server supports ciphers that don't use ECC at a lower priority
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local fallback_available="False"
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# return variable: list of curves supported by server, in order
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current_curves=""
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# return variable: check if server uses server side or client side ordering
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# for curves
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curves_ordering="server"
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local curves=(${CURVES[*]})
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OLDIFS="$IFS"
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IFS=':'
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verbose "Will test following curves: ${curves[*]}"
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IFS="$OLDIFS"
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# prepare the ssl command we'll be using
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local sslcommand=""
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sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
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if [ -n "$CAPATH" ]; then
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sslcommand+=" -CApath $CAPATH -showcerts"
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elif [ -e "$CACERTS" ]; then
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sslcommand+=" -CAfile $CACERTS"
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fi
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sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $current_cipher"
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# force the TLS to send a TLS1.0 client hello at least, as with SSLv2
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# ciphers present it will try to send a SSLv2 compatible client hello
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sslcommand+=" -no_ssl2 -no_ssl3"
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#
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# here we use the same logic as with detecting cipher suites: first
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# advertise all curves as supported, then remove curves one by one until we
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# either get a fallback to a non ECC cipher, we run of curves or server
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# tries to negotiate a curve we didn't advertise
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#
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while [[ ${#curves[@]} -gt 0 ]]; do
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OLDIFS="$IFS"
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IFS=':'
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local test_curves="${curves[*]}"
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IFS="$OLDIFS"
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verbose "Testing $test_curves with command $sslcommand"
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ratelimit
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local tmp=$(echo Q | $sslcommand -curves $test_curves 2>/dev/null)
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parse_openssl_output <<<"$tmp"
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if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
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break
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else
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# server accepted connection
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local ephem_data=(${current_pfs//,/ })
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local cname=""
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if [[ ${ephem_data[0]} =~ ECDH ]]; then
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if [ "$current_curves" != "" ]; then
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current_curves+=","
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fi
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cname="$(get_curve_name ${ephem_data[1]})"
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verbose "Server selected ${ephem_data[1]}, a.k.a $cname"
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current_curves+="$cname"
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fi
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for id in "${!curves[@]}"; do
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if [ "$cname" == ${curves[$id]} ]; then
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# we know it's supported, remove it from set of offered ones
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unset curves[$id]
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break
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fi
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done
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fi
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[ "$OUTPUTFORMAT" == "terminal" ] && [ $DEBUG -lt 1 ] && echo -n '.'
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done
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# don't penalize servers that will negotiate all curves we know of...
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if [[ ${#curves[@]} -eq 0 ]]; then
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fallback_supported="unknown"
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fi
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#
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# check if curves ordering is server of client side
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#
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local tmp_curves=(${current_curves//,/ })
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verbose "Server supported curves: ${tmp_curves[@]}"
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# server supports just one or none, so it effectively uses server side
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# ordering (as it dictates what curves client must support)
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if [ ${#tmp_curves[@]} -lt 2 ]; then
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curves_ordering="server"
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else
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# server supports at least 2 curves, rotate their order, see if
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# selected changes
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test_curves=""
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most_wanted="${tmp_curves[${#tmp_curves[@]}-1]}"
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for (( i=${#tmp_curves[@]}-1; i>0; i--)); do
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test_curves+="${tmp_curves[$i]}:"
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done
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test_curves+="${tmp_curves[0]}"
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verbose "Testing ordering with $sslcommand -curves $test_curves"
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ratelimit
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local tmp=$(echo Q | $sslcommand -curves $test_curves 2>/dev/null)
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parse_openssl_output <<<"$tmp"
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||||
|
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if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
|
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fallback_supported="order-specific"
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||||
verbose "Server aborted connection"
|
||||
else
|
||||
local ephem_data=(${current_pfs//,/ })
|
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verbose "Server selected $current_cipher with $current_pfs"
|
||||
verbose "ephem_data: ${ephem_data[@]}"
|
||||
|
||||
if [[ ${ephem_data[0]} =~ ECDH ]]; then
|
||||
verbose "Server did select ${ephem_data[1]} curve"
|
||||
curves_ordering="inconclusive-${ephem_data[1]}"
|
||||
local cname="$(get_curve_name ${ephem_data[1]})"
|
||||
if [ "$cname" == "$most_wanted" ]; then
|
||||
curves_ordering="client"
|
||||
else
|
||||
curves_ordering="server"
|
||||
fi
|
||||
else
|
||||
# some servers downgrade to non ECDH when curve order is changed
|
||||
curves_ordering="inconclusive-noecc"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
test_curves_fallback() {
|
||||
# "True" if server supports ciphers that don't use ECC at a lower priority
|
||||
local fallback_available="False"
|
||||
# return variable: whatever a server will fall back to non ECC suite when
|
||||
# client doesn't advertise support for curves the server needs
|
||||
fallback_supported="unknown"
|
||||
|
||||
if [ "$ecc_ciphers" == "" ]; then
|
||||
verbose "No ECC cipher found, can't test curve fallback"
|
||||
return
|
||||
fi
|
||||
|
||||
# prepare the ssl command we'll be using
|
||||
local sslcommand=""
|
||||
sslcommand="$TIMEOUTBIN $TIMEOUT $OPENSSLBIN s_client"
|
||||
if [ -n "$CAPATH" ]; then
|
||||
sslcommand+=" -CApath $CAPATH -showcerts"
|
||||
elif [ -e "$CACERTS" ]; then
|
||||
sslcommand+=" -CAfile $CACERTS"
|
||||
fi
|
||||
sslcommand+=" -status $SCLIENTARGS -connect $TARGET -cipher $ecc_ciphers"
|
||||
# force the TLS to send a TLS1.0 client hello at least, as with SSLv2
|
||||
# ciphers present it will try to send a SSLv2 compatible client hello
|
||||
sslcommand+=" -no_ssl2 -no_ssl3"
|
||||
|
||||
#
|
||||
# here we use the same logic as with detecting cipher suites: first
|
||||
# advertise all curves as supported, then remove curves one by one until we
|
||||
# either get a fallback to a non ECC cipher, we run of curves or server
|
||||
# tries to negotiate a curve we didn't advertise
|
||||
#
|
||||
local curves=(${CURVES[*]})
|
||||
while [[ ${#curves[@]} -gt 0 ]]; do
|
||||
OLDIFS="$IFS"
|
||||
IFS=':'
|
||||
local test_curves="${curves[*]}"
|
||||
IFS="$OLDIFS"
|
||||
verbose "Testing $sslcommand -curves $test_curves"
|
||||
|
||||
ratelimit
|
||||
local tmp=$(echo Q | $sslcommand -curves $test_curves 2>/dev/null)
|
||||
parse_openssl_output <<<"$tmp"
|
||||
|
||||
if [[ -z $current_protocol || $current_cipher == "(NONE)" || $current_cipher == '0000' ]]; then
|
||||
verbose "Curve fallback failed, server refused connection"
|
||||
fallback_supported="False"
|
||||
break
|
||||
else
|
||||
# server accepted connection
|
||||
local ephem_data=(${current_pfs//,/ })
|
||||
|
||||
if [[ ${ephem_data[0]} =~ ECDH ]]; then
|
||||
# we got an ecc connection, remove the curve from the list of testable curves
|
||||
local cname="$(get_curve_name ${ephem_data[1]})"
|
||||
verbose "Server selected curve $cname"
|
||||
for id in "${!curves[@]}"; do
|
||||
if [ "${curves[id]}" == "$cname" ]; then
|
||||
unset curves[$id]
|
||||
break
|
||||
fi
|
||||
done
|
||||
else
|
||||
verbose "Server fell back to $current_cipher"
|
||||
# ok, we got a fallback
|
||||
fallback_supported="True"
|
||||
break
|
||||
fi
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
# If no options are given, give usage information and exit (with error code)
|
||||
if [ $# -eq 0 ]; then
|
||||
usage;
|
||||
@ -671,6 +984,14 @@ do
|
||||
SAVECRT="$2"
|
||||
shift 2
|
||||
;;
|
||||
--curves)
|
||||
TEST_CURVES="True"
|
||||
shift 1
|
||||
;;
|
||||
--no-curves)
|
||||
TEST_CURVES="False"
|
||||
shift 1
|
||||
;;
|
||||
--) # End of all options
|
||||
shift
|
||||
break
|
||||
@ -711,6 +1032,13 @@ if [ ! -x $OPENSSLBIN ]; then
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ $TEST_CURVES == "True" ]; then
|
||||
if [ ! -z "$($OPENSSLBIN s_client -curves 2>&1|head -1|grep 'unknown option')" ]; then
|
||||
echo "curves testing not available with your version of openssl, disabling it"
|
||||
TEST_CURVES="False"
|
||||
fi
|
||||
fi
|
||||
|
||||
if [ $VERBOSE != 0 ] ; then
|
||||
[ -n "$CACERTS" ] && echo "Using trust anchors from $CACERTS"
|
||||
echo "Loading $($OPENSSLBIN ciphers -v $CIPHERSUITE 2>/dev/null|grep Kx|wc -l) ciphersuites from $(echo -n $($OPENSSLBIN version 2>/dev/null))"
|
||||
@ -730,6 +1058,10 @@ get_cipher_pref $CIPHERSUITE
|
||||
|
||||
test_serverside_ordering
|
||||
|
||||
if [[ $TEST_CURVES == "True" ]]; then
|
||||
test_curves_fallback
|
||||
fi
|
||||
|
||||
if [ "$OUTPUTFORMAT" == "json" ]; then
|
||||
display_results_in_json
|
||||
else
|
||||
|
||||
@ -72,6 +72,9 @@ handshakestats = defaultdict(int)
|
||||
keysize = defaultdict(int)
|
||||
sigalg = defaultdict(int)
|
||||
tickethint = defaultdict(int)
|
||||
eccfallback = defaultdict(int)
|
||||
eccordering = defaultdict(int)
|
||||
ecccurve = defaultdict(int)
|
||||
ocspstaple = defaultdict(int)
|
||||
dsarsastack = 0
|
||||
total = 0
|
||||
@ -86,6 +89,9 @@ for r,d,flist in os.walk(path):
|
||||
tempdsakeystats = {}
|
||||
tempsigstats = {}
|
||||
tempticketstats = {}
|
||||
tempeccfallback = "unknown"
|
||||
tempeccordering = "unknown"
|
||||
tempecccurve = {}
|
||||
""" supported ciphers by the server under scan """
|
||||
tempcipherstats = {}
|
||||
ciphertypes = 0
|
||||
@ -141,6 +147,21 @@ for r,d,flist in os.walk(path):
|
||||
if len(results['ciphersuite']) < 1:
|
||||
continue
|
||||
|
||||
""" save ECC fallback (new format) """
|
||||
if 'curves_fallback' in results:
|
||||
tempeccfallback = results['curves_fallback']
|
||||
|
||||
""" save ECC curve stats (old format) """
|
||||
if 'curve_fallback' in results:
|
||||
tempeccfallback = results['curve_fallback']
|
||||
if 'curve_ordering' in results:
|
||||
tempeccordering = results['curve_ordering']
|
||||
if 'curve' in results:
|
||||
for curve in results['curve']:
|
||||
tempecccurve[curve] = 1
|
||||
if len(results['curve']) == 1:
|
||||
tempecccurve[curve + ' Only'] = 1
|
||||
|
||||
""" loop over list of ciphers """
|
||||
for entry in results['ciphersuite']:
|
||||
|
||||
@ -265,6 +286,16 @@ for r,d,flist in os.walk(path):
|
||||
TLS1_1 = True
|
||||
elif protocol == 'TLSv1.2':
|
||||
TLS1_2 = True
|
||||
|
||||
""" save ECC curves stats """
|
||||
if 'curves_ordering' in entry:
|
||||
tempeccordering = entry['curves_ordering']
|
||||
if 'curves' in entry:
|
||||
for curve in entry['curves']:
|
||||
tempecccurve[curve] = 1
|
||||
if len(entry['curves']) == 1:
|
||||
tempecccurve[curve + ' Only'] = 1
|
||||
|
||||
json_file.close()
|
||||
|
||||
""" don't store stats from unusued servers """
|
||||
@ -329,6 +360,11 @@ for r,d,flist in os.walk(path):
|
||||
for s in tempticketstats:
|
||||
tickethint[s] += 1
|
||||
|
||||
eccfallback[tempeccfallback] += 1
|
||||
eccordering[tempeccordering] += 1
|
||||
for s in tempecccurve:
|
||||
ecccurve[s] += 1
|
||||
|
||||
if ocsp_stapling is None:
|
||||
ocspstaple['Unknown'] += 1
|
||||
elif ocsp_stapling:
|
||||
@ -518,6 +554,24 @@ for stat in sorted(pfsstats):
|
||||
pfspercent = round(pfsstats[stat] / handshakestats['DHE'] * 100, 4)
|
||||
sys.stdout.write(stat.ljust(25) + " " + str(pfsstats[stat]).ljust(10) + str(percent).ljust(9) + str(pfspercent) + "\n")
|
||||
|
||||
print("\nSupported ECC curves Count Percent ")
|
||||
print("-------------------------+---------+--------")
|
||||
for stat in sorted(ecccurve):
|
||||
percent = round(ecccurve[stat] / total * 100, 4)
|
||||
sys.stdout.write(stat.ljust(25) + " " + str(ecccurve[stat]).ljust(10) + str(percent).ljust(9) + "\n")
|
||||
|
||||
print("\nUnsupported curve fallback Count Percent ")
|
||||
print("------------------------------+---------+--------")
|
||||
for stat in sorted(eccfallback):
|
||||
percent = round(eccfallback[stat] / total * 100,4)
|
||||
sys.stdout.write(stat.ljust(30) + " " + str(eccfallback[stat]).ljust(10) + str(percent).ljust(9) + "\n")
|
||||
|
||||
print("\nECC curve ordering Count Percent ")
|
||||
print("-------------------------+---------+--------")
|
||||
for stat in sorted(eccordering):
|
||||
percent = round(eccordering[stat] / total * 100, 4)
|
||||
sys.stdout.write(stat.ljust(25) + " " + str(eccordering[stat]).ljust(10) + str(percent).ljust(9) + "\n")
|
||||
|
||||
print("\nTLS session ticket hint Count Percent ")
|
||||
print("-------------------------+---------+--------")
|
||||
for stat in natural_sort(tickethint):
|
||||
|
||||
@ -68,7 +68,7 @@ function scan_host() {
|
||||
if [ $? -gt 0 ]; then
|
||||
return
|
||||
fi
|
||||
../cipherscan --capath ca_files --saveca --savecrt certs --delay 2 -json -servername $1 $2:443 > results/$1@$2
|
||||
../cipherscan --capath ca_files --saveca --curves --savecrt certs --delay 2 -json -servername $1 $2:443 > results/$1@$2
|
||||
}
|
||||
|
||||
function scan_host_no_sni() {
|
||||
@ -80,7 +80,7 @@ function scan_host_no_sni() {
|
||||
if [ $? -gt 0 ]; then
|
||||
return
|
||||
fi
|
||||
../cipherscan --capath ca_files --saveca --savecrt certs --delay 2 -json $1:443 > results/$1
|
||||
../cipherscan --capath ca_files --saveca --curves --savecrt certs --delay 2 -json $1:443 > results/$1
|
||||
}
|
||||
|
||||
function scan_hostname() {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user